"But not Glenn Grothman," an announcer says in the spots -- titled, "Caving In" -- adding the GOP senator from Campbellsport has a record of "fighting liberals, cutting taxes, making it illegal to buy junk food with food stamps."

The TV spot opens with an announcer say it's "hard to tell Washington politicians apart" alongside footage of lawmakers with their faces blurred. A similar sequence -- this one appearing to show 6th CD rival Sen. Joe Leibham, R-Sheboygan -- appears later the ad, with the announcer saying "not just any Republican will do."

Grothman's campaign said the TV ad will air in the Green Bay market and on cable.